SchedulerMixin from_pretrained and ConfigMixin Self type annotation (#11192)

Author: hlky

src/diffusers/configuration_utils.py

@@ -35,6 +35,7 @@
     validate_hf_hub_args,
 )
 from requests import HTTPError
+from typing_extensions import Self
 
 from . import __version__
 from .utils import (
@@ -185,7 +186,9 @@ def save_config(self, save_directory: Union[str, os.PathLike], push_to_hub: bool
             )
 
     @classmethod
-    def from_config(cls, config: Union[FrozenDict, Dict[str, Any]] = None, return_unused_kwargs=False, **kwargs):
+    def from_config(
+        cls, config: Union[FrozenDict, Dict[str, Any]] = None, return_unused_kwargs=False, **kwargs
+    ) -> Union[Self, Tuple[Self, Dict[str, Any]]]:
         r"""
         Instantiate a Python class from a config dictionary.
 

src/diffusers/schedulers/scheduling_utils.py

@@ -19,6 +19,7 @@
 
 import torch
 from huggingface_hub.utils import validate_hf_hub_args
+from typing_extensions import Self
 
 from ..utils import BaseOutput, PushToHubMixin
 
@@ -99,7 +100,7 @@ def from_pretrained(
         subfolder: Optional[str] = None,
         return_unused_kwargs=False,
         **kwargs,
-    ):
+    ) -> Self:
         r"""
         Instantiate a scheduler from a pre-defined JSON configuration file in a local directory or Hub repository.